Secondary Transformer Circuit Breaker

[Bobster]

All of this is irreverent if the OP want's to use the transformer for a fixed piece of equipment. It may only need 2A.

What is it you are wanting to use it for?

 

[mjbarcelona]

All of this is irreverent if the OP want's to use the transformer for a fixed piece of equipment. It may only need 2A.

What is it you are wanting to use it for?

I'll use it to power PLC, 24V (10A) power supply, and contactors.

 

[Bobster]

Fit an 8A breaker you'll be fine.

A 10A 24V power supply doesn't need more than 240 watts on the input side, so at 120V 2 amps maximum. PLC will likely require 1 amp maximum. An unless you've dozens of contactors using the 110V and not the 24v then this will be less than 2 amp of load.